采用FPGA控制ADS7844进行模数转换。ADS7844 是Burr_Brown公司推出的一种高性能、宽电压、低功耗的12 b串行数模转换器。它有8个模拟输入端，可用软件编程为8通道单端输入A／D转换器或4通道差分输入A／D转换器，其转换率高达200 kHz，而线性误差和差分误差最大仅为±1 LSB。-Using FPGA control ADS7844 analog to digital conversion. ADS7844 is a Burr_Brown the company introduced a high-performance, wide-voltage, low-power 12 b serial DAC. It has 8 analog inputs, available software programming for the 8-channel single-ended input A/D converter or 4-channel differential input A/D converter, the conversion rate of up to 200 kHz, while the maximum linearity error and differential error is only To ± 1 LSB.